summaryrefslogtreecommitdiffstats
path: root/drivers/md/dm-cache-target.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/md/dm-cache-target.c')
-rw-r--r--drivers/md/dm-cache-target.c13
1 files changed, 6 insertions, 7 deletions
diff --git a/drivers/md/dm-cache-target.c b/drivers/md/dm-cache-target.c
index 5f054c44b485..2c63326638b6 100644
--- a/drivers/md/dm-cache-target.c
+++ b/drivers/md/dm-cache-target.c
@@ -231,7 +231,7 @@ struct cache {
/*
* cache_size entries, dirty if set
*/
- dm_cblock_t nr_dirty;
+ atomic_t nr_dirty;
unsigned long *dirty_bitset;
/*
@@ -492,7 +492,7 @@ static bool is_dirty(struct cache *cache, dm_cblock_t b)
static void set_dirty(struct cache *cache, dm_oblock_t oblock, dm_cblock_t cblock)
{
if (!test_and_set_bit(from_cblock(cblock), cache->dirty_bitset)) {
- cache->nr_dirty = to_cblock(from_cblock(cache->nr_dirty) + 1);
+ atomic_inc(&cache->nr_dirty);
policy_set_dirty(cache->policy, oblock);
}
}
@@ -501,8 +501,7 @@ static void clear_dirty(struct cache *cache, dm_oblock_t oblock, dm_cblock_t cbl
{
if (test_and_clear_bit(from_cblock(cblock), cache->dirty_bitset)) {
policy_clear_dirty(cache->policy, oblock);
- cache->nr_dirty = to_cblock(from_cblock(cache->nr_dirty) - 1);
- if (!from_cblock(cache->nr_dirty))
+ if (atomic_dec_return(&cache->nr_dirty) == 0)
dm_table_event(cache->ti->table);
}
}
@@ -2269,7 +2268,7 @@ static int cache_create(struct cache_args *ca, struct cache **result)
atomic_set(&cache->quiescing_ack, 0);
r = -ENOMEM;
- cache->nr_dirty = 0;
+ atomic_set(&cache->nr_dirty, 0);
cache->dirty_bitset = alloc_bitset(from_cblock(cache->cache_size));
if (!cache->dirty_bitset) {
*error = "could not allocate dirty bitset";
@@ -2808,7 +2807,7 @@ static void cache_status(struct dm_target *ti, status_type_t type,
residency = policy_residency(cache->policy);
- DMEMIT("%u %llu/%llu %u %llu/%llu %u %u %u %u %u %u %llu ",
+ DMEMIT("%u %llu/%llu %u %llu/%llu %u %u %u %u %u %u %lu ",
(unsigned)(DM_CACHE_METADATA_BLOCK_SIZE >> SECTOR_SHIFT),
(unsigned long long)(nr_blocks_metadata - nr_free_blocks_metadata),
(unsigned long long)nr_blocks_metadata,
@@ -2821,7 +2820,7 @@ static void cache_status(struct dm_target *ti, status_type_t type,
(unsigned) atomic_read(&cache->stats.write_miss),
(unsigned) atomic_read(&cache->stats.demotion),
(unsigned) atomic_read(&cache->stats.promotion),
- (unsigned long long) from_cblock(cache->nr_dirty));
+ (unsigned long) atomic_read(&cache->nr_dirty));
if (writethrough_mode(&cache->features))
DMEMIT("1 writethrough ");
OpenPOWER on IntegriCloud